Cutting device for opening plaster casts on the bodies of injured.



H. BRINCK.

CUTTING DEVICE on OPENING PLASTER CASTS ON THE BODIES 0F INJURED.

APPLICATION FILED AUG.2I. I917- 1,269,373., I Patented June 11, 1918.

" INVENTOR.

' diseases.

.;: HANS Barrack; or Los antennas, cnmromrm, assren'on or roars-menu one.- i a nnrmiann'rns r0 LOUIS E. BERGERON, or emcee-0, rumors.

CUTTTNG DEVICE FDR OPENING FLASTER CASTS ON THE BODIES 0F INJURED.

. Application filed August 21, 1917. Serial No. 187,456.

To all wltom a't may concern."

Be it known thatI, HANS BRINCK, a subject of the Emperor of Germany, residing at Los Angeles, in .the'county of Los Angeles and State of California, have invented a new and useful "Cutting Device for Opening Plaster Casts on the Bodies of Injured, of which the following is a specification.

his invention relates to a cutting device and particularly pertains to a device for opening plaster casts.

It is. the principal object of this invention to provide acuttingdevice which may be mechanically operated to. cut through the walls of a plaster cast while it is in position upon the body and which will operate to form a straight out the length of the cast and entirely therethrough without danger of injuring the skin" therebeneath orcausing pain during the operation.

Another object of this invention is to provide a device to produce the above results which will open the plaster cast and allow it to be preserved so that it may be replaced arozi nd the injured member and thus reuse Other objects will appear hereinafter.

The invention is illustrated, by way of example, in the accompanying drawings in which:

Figure 1 is a view in plan illustrating the cutting device with parts broken away and particularly disclosing the manner in which the cutter is mountedand driven.

Fig. 2 1s a view in side elevation illus-s.

trating the assembled cutter with a portion of the handle broken away and disclosing in detail the protecting member, and the cutter mountin i Fig. 3 is a fra entary view illustrating in a diagrammatlcal' manner the operation of the cutting tool andthe position of a cast clamp around the cast.

Fig. 4. is a view in transverse section on the line H of Fig. 2 disclosing the formation of the protecting plate. 7

Fig. 5 is a view in end elevation illustrating one of the cast clamps.

Fig. 6 is a view in side elevation illustrating the bolt used with the cast clamp.

Referring more particularly to the drawings, 7 indicates a handle having a portlon at one end and a rectangular handle fork at its opposite end. interposed between the side arms of the fork is a pair of Specification of letters Patent.

position an operating plate, the spacing Patented June ill, 119218.

driving gears 9, one of which ismounted upon a spindle 9, While the other 1s mounted upon a spindle 10. This spindle 1s provided with a circular cutting member 10, the

periphery of which is formed with cutting teeth. Formed at the end of the fork 8 and extending outwardly therefrom is an extension lug 11. Hinge plates 12 are secured by a pivot pin 11 at opposite sides of sa d extension lug, and are connected at their op posite ends to an upwardly extending log 13 by a pin 13. This last-named lug 1s formed integral with a combined guide and shield plate 14: adapted to pass between the body of the patient and the cast to protect the skin from the cutting member and to form a stop face for a distance pin 17 which will strike the plate when the cutting member has passed entirely through the wall of the cast. A longitudinally extending groove 16 is formed along the upper face of the shield and insures that the cutting member will entirely pass cast in a manner derstood.

In operation, the cutting device is used as shown in its assembled position in Fig. 2. At this time the forward edge of the shield plate 14 is slipped between the cast and the injured member. As this is drawn into crank 15 is actuated to rotate the spindle 9' and in turn impart motion to the gears 9 and the cutter spindle 10'. the direction of the arrow -a-, cutter 10 will be rotated in the direction of the arrow -b, as indicated in Fig. 2. The shield is held motionless while the handle 7 is swung downwardly in the direction of the arrow c in'Fig. 2 until the periphery of the cutter has entirely passed through the wall of the cast. This will be indicated by the distance pin 17 which will be brought to bear against the upper face of the shield member which will be readily un- 14. The rotation of the crank may then be.

device is drawn along Fig. 3. During the It will thus be seen that the device here disclosed is simple in its construction, may

through the wall of the.

When this handle is rotated in name-7e be easily applied, and operated without pain to the patient or inconvenience to the oper-. ator, and will act upon the castin a manner to permit it to be re-used if desired,

While I have shown the'preferred construction of my cutting device for opening plaster casts as now known to me, it w' be understood that various changes in the combination, construction and arrangements of parts may be made by those skilled in the are without departing from the'spirit of my.

invention as claimed.

I claim: 1. A cutting device for openin plaster casts, comprising a shield plate a apted to be interposed between the wall of a cast and an injured member inclosed thereby, a fixed lug extending upwardly from one end of said late, a handle pivotally mounted to said ug for radial and longitudinal movement in relation to the plate, a rotary cutting member mounted upon the handle and adapted to swing therewith, driving gears b which thecutting member is driven, a cra rotating said driving gears, and a, stop pin extending downwardly from the handle to strike the plate when the periphery of the cutting member has passed through the wall ally connected to the hinged plates, a fork V rigid with the extension lug, a handle rigid with the fork, a pair of driving gears operatively mounted in the fork, a crank for operating one gear, a circular cutting member mounted upon the spindle of the other gear in line with the groove in the shield, and:

stop means to limit the downward swing of the fork.

In testimony whereof I hereunto afix my signature in the presence of two witnesses. I S BRINCK.

Witnesses M, E. Cums, C. 

